Please answer all the above questions correctly providing necessary formulae, equations, expressions, diagrams, charts, graphs, plots and tables.

3. The elementary irreversible 1st order gas-phase catalytic reaction AB is carried out isothermally in a batch reactor. The catalytic deactivation follows a first order decay law and is [5] independent of the concentration of both A and B. a) Derive the equations to predict the time trajectories of catalyst activity and conversion. b) Calculate the catalytic activity and conversion after 10 minutes at 300K. Additional information: CA0=1Lmol;V=1L;W=1kg;kd=0.1min1;k=0.1L(kgCatmin)1at300K;REd=2000K;REA=500K 4. Two small samples of solids are roasted isothermally in a constant environment in air stream. The following data is obtained: Assume that the reaction follows the SCM. a) Find the rate controlling mechanism and rate equation. b) Determine the time needed for complete conversion of the solid of size R=1mm, all other parameters remain unchanged. [10] 5. The data obtained for a first order solid catalyzed gas phase reaction, in absence of pore diffusion mol/cm3 at 1atm and 400C. Determine the largest size of catalyst pellet that should be used to ensure negligible pore diffusion for this reaction. The effective diffusivity of A in catalyst pellet =103 cm2/s. [10] 6. Substrate A and enzyme E flow through a MFR ( V=10 liter). Find a rate equation to represent the action of enzyme on the substrate using the following data: The concentration of enzyme is fixed for each run, CB0=0.02mol/ liter. [10]